This class doesn't provides any method to manage mapping between physical
schema and logical schema. It only permit to define a context in the ODI topology.
Such OdiContext can then be used to map schemas using the class
OdiContextualSchemaMapping.

getContextId

getInternalId

Provides a common getter for the persistence layer to obtain an identity,
irrespective of the actual type of identity used.

Typically a subclass will delegate to a public
SomePrimitiveWrapper getId() method. The necessity for the
getInternalId() abstract method is solely because the
persistence layer needs a way of obtaining the identity irrespective of
the actual identity implementation choice.

Returning null from this method will indicate the object has
never been saved. This will likely be relied on by some DAO
implementations.